diff --git a/doc/UserGuide/CustomizingTheUPP/EnablingOutput.rst b/doc/UserGuide/CustomizingTheUPP/EnablingOutput.rst
new file mode 100644
index 000000000..fe8e11e05
--- /dev/null
+++ b/doc/UserGuide/CustomizingTheUPP/EnablingOutput.rst
@@ -0,0 +1,47 @@
+.. role:: bolditalic
+    :class: bolditalic
+
+.. _enabling-output:
+
+********************************
+User-Defined Sigma Level Output
+********************************
+
+This documentation describes the steps to generate model output at user-defined sigma levels using the Unified Post Processor (UPP). The instructions address the configuration of XML files and the resolution of potential issues encountered during this process.
+
+Generating Sigma Level Output
+-----------------------------
+
+UPP can output temperature, U, and V components on sigma surfaces. These correspond to indices 206, 208, and 209 in the :doc:`GRIB2 <UPP_GRIB2_Table_byID>` table. Follow these steps to configure your workflow for this output:
+
+Configuring XML Files
+^^^^^^^^^^^^^^^^^^^^^^
+
+An XML :ref:`control file <control-file>` determines what fields and levels UPP will output. 
+
+#. **Locate the XML Control File**: Control files for various operational models are located in the ``UPP/parm`` directory. The ``post_avblflds.xml`` file contains all fields that the UPP can output. 
+
+#. **Modify the Control XML**: Copy the entries for temperature, U, and V (indices 206, 208, and 209) from ``post_avblflds.xml`` to the control XML file used in your workflow. Be sure to include a ``<level></level>`` tag with the appropriate levels in the XML control file to define which sigma levels to output.
+
+#. **Validate the Control File**: Validate the control XML file against the ``EMC_POST_CTRL_Schema.xsd`` schema according to :ref:`these instructions <create_txt_file>`.
+
+#. **Flat Text File Generation**: Convert the control XML to a flat text file based on the information in the :ref:`create_txt_file` documentation.
+
+Source Code Modifications
+^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+By default, only certain sigma levels are outputted. These levels are defined in `SET_LVLSXML.f <https://github.com/NOAA-EMC/UPP/blob/develop/sorc/ncep_post.fd/SET_LVLSXML.f>`_ using the ``ASIGO1`` array. Users must review these levels in the ``SET_LVLSXML.f`` file to confirm compatibility with their requirements. If the default sigma levels are insufficient, users must:
+
+#. **Modify** :bolditalic:`SET_LVLSXML.f`: Change the entries for ``ASIGO1`` to include your desired sigma levels.
+
+#. **Recompile UPP**: Recompile the UPP source code after making the changes.
+
+#. **Update XML Tags**: Ensure that the XML control file explicitly references the modified sigma levels in the ``<level></level>`` tag.
+
+.. hint::
+
+   - Adding ``<level></level>`` tags manually allows UPP to compile and run successfully, but it will not produce any output unless the levels are also modified in ``SET_LVLSXML.f`` and properly referenced.
+
+   - Fortran I/O errors may occur if the sigma levels in the control file are not synchronized with the source code configuration.
+
+   - Comprehensive documentation on control files can be found in the :ref:`control-file` documentation, which provides details about XML file formatting and flat file generation.
diff --git a/doc/UserGuide/CustomizingTheUPP/index.rst b/doc/UserGuide/CustomizingTheUPP/index.rst
index eb7f24bb0..a06c093ad 100644
--- a/doc/UserGuide/CustomizingTheUPP/index.rst
+++ b/doc/UserGuide/CustomizingTheUPP/index.rst
@@ -6,4 +6,5 @@ Customizing the UPP
    
    AddNewVariable
    Regridding
+   EnablingOutput